Revert "Use CLOCK_MONOTONIC_COARSE and CLOCK_REALTIME_COARSE on Linux if available."

This reverts commit r17611 for breaking the host toolchain build
for Android (missing clock_gettime() and clock_getres() functions).

TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/68513002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17614 ce2b1a6d-e550-0410-aec6-3dcde31c8c00